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<p><b>OBJECTIVE</b>To investigate characteristics and the differences of the anatomical parameters of the proximal femur of the developmental dysplasia of the hip (DDH).</p><p><b>METHODS</b>A total of 38 patients(47 hips) diagnosed as DDH with CT scan data and the pelvis radiograph from January 2012 to December 2014 in China-Japan Union Hospital of Jilin University were retrospectively analyzed. All the hips were divided into 3 groups according to Crowe classification method. Thirty normal hips were selected as controls who admitted at the same time. CT data of the patients were imported into Mimics 17.0. The three-dimensional models of the proximal femur were then reconstructed, and the following parameters were measured: neck-shaft angle, neck length, offset, height of the centre of femoral head, height of the isthmus, height of greater trochanter, the medullary canal diameter of isthmus (Di), the medullary canal diameter 10 mm above the apex of the lesser trochanter (DT+ 10), the medullary canal diameter 20 mm below the apex of the lesser trochanter (DT-20), and then DT+ 10/Di, DT-20/Di and DT+ 10/DT-20 were calculated.Variance discrepancy analysis was used to compare the difference among the four groups, and LSD method was used to compare the difference between either two groups.</p><p><b>RESULTS</b>The parameters of neck-shaft angle of DDH with Crowe I, Crowe II-III, Crowe IV and the control group were (131.8°±7.1°), (131.7°±6.5°), (122.8°±11.4°) and (131.8°±5.9°), respectively; the parameters of neck-shaft angle of DDH with Crowe IV was smaller than that of DDH with Crowe I, Crowe II-III and control group (all P<0.05). The parameters of the neck length of DDH with Crowe IV ((44.6±6.6) mm) was smaller than that of DDH with Crowe I ((48.6±6.7) mm), Crowe II-III ((50.4±4.7) mm) (all P<0.05). There is no statistic difference in the offset among the groups (F=2.392, P>0.05). The parameters of the height of greater trochanter of DDH with Crowe IV ((12.1±6.1) mm) was bigger than that of DDH with Crowe I ((8.9±7.2) mm), Crowe II-III ((7.5±3.3) mm) and control group ((6.1±3.9) mm) (all P<0.05). The parameters of the height of the centre of femoral head of DDH with Crowe I, Crowe II-III, Crowe IV were (39.6±6.5) mm, (39.1±4.2) mm, (38.8±8.6) mm, which were smaller than that of the control group ((46.5±6.2) mm) (all P<0.05). The parameters of Di of DDH with Crowe I, Crowe II-III, Crowe IV and the control group were (9.9±2.2) mm, (8.3±1.8) mm, (8.7±1.7) mm and (10.1±1.4) mm; the parameters of Di of DDH with Crowe II-III and Crowe IV were smaller than that of the control group (all P<0.05). The parameters of DT+ 10 ((17.2±5.3) mm) and DT-20 ((12.2±3.0) mm) of DDH with Crowe IV were smaller than that of DDH with Crowe I ((25.2±3.4) mm, (17.1±2.3) mm) and Crowe II-III ((21.9±4.2) mm, (16.3±3.2) mm) (all P<0.05). The parameter of the height of the isthmus of DDH with Crowe IV ((94.1±19.7) mm) was smaller than that of DDH with Crowe I ((106.2±13.8) mm), Crowe II-III ((108.8±10.5) mm) and control group ((116.5±10.6) mm), respectively (P=0.010, 0.008, 0.000). The parameters of DT+ 10/Di (2.0±0.4) and DT-20/Di (1.4±0.2) of DDH with Crowe IV were smaller than that of DDH with Crowe I (2.6±0.5, 1.8±0.3), Crowe II-III (2.7±0.60, 1.9±0.3) (all P<0.05).</p><p><b>CONCLUSIONS</b>Comparing to DDH with Crowe I-III and control group, DDH with Crowe IV has a dramatic change in the intramedullary and extramedullary parameters. The isthmus and the great trochanter are higher and there is apparent narrowing of the medullary canal around the level of the lesser trochanter.</p>
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Adult , Humans , Analysis of Variance , Case-Control Studies , Femur , Congenital Abnormalities , Diagnostic Imaging , Hip Dislocation, Congenital , Classification , Diagnostic Imaging , Hip Joint , Diagnostic Imaging , Retrospective Studies , Tomography, X-Ray ComputedABSTRACT
Objective To explore the influence of pelvis obliquity in lateral position to acetabular component orientation during total hip arthroplasty (THA),and the method to correct.Methods Fifty patients (62 hips) were performed THA with posterolateral incision in lateral position by the same team.The patients were randomized and divided into experimental group (EX,with 25 cases,34 hips) and control group (CON,with 25 cases,28 hips).In EX group,the acetabular components were placed by means of the gradienter and plumb correcting technique during THA.While in CON group,the acetabular components were placed by traditional method during THA.The acetabular abduction angles were measured postoperatively,and compared between the two groups.Results The average obliquity of pelvis was-1.647°±4.512°in EX group when putting the patient in lateral position before correcting.Through the application of gradienter and plumb,the average abduction angle of acetabular component was 42.685°±3.355° postoperatively,with the difference of 1.962°±1.515° compared with the preoperative angles.And in CON group,the average abduction angle of acetabular component was 44.534°±4.844° postoperatively,with the difference of 4.244°±3.042°.The difference of abduction angle in CON group was much higher than that in EX group (P＜0.05).Conclusion The pelvic obliquity when putting the patient under lateral position will affect the surgeons'judgments of placing acetabular component during THA,furthermore,lead to inconsistency among the abduction angles obtained preoperatively,intraoperatively and postoperatively.By applying the correcting method with gradienter and plumb,the discrepancy can reduce obviously between the abduction angle measured postoperatively and that of measured during operation comparing with traditional method.
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Objective To evaluate the diagnostic value of tracking movement of normal patellar using volume scan on sensation 320 CT. Method Data of dynamic scans of 30 knees was collected using the motor function of 320 CT and retrospectively analyzed. The data of movement of the patellorfemoral joint was obtained during flexion (from 0° to 120°) within 10-sec by 320 CT from all volunteers. The 3D coordinate of the center of patella was recorded to investigate the dispose relation of patellofemoral joint.Result With the knee angle changed from 0° to 90°, the patella moved rapidly along the Y-axis direction ( sagittal plane) down about (53.87 ± 0. 45 ) mm, and then entered the plateau phase with little change.When the knee flexion reached 10°-30° ,the patellar movement along the X-axis reached the largest range of (2. 31 ±0. 52)-(3.36 ± 0. 43 ) mm, and subsequently moved to the opposite lateral direction with the maximum about (8. 53 ± 0. 44 ) mm at 120°. In the Z axis, the track initially showed plateau, and then presented a rapidly downward trend after 30°. The patellar tracking is like an outward arc during the whole knee flexion. Conclusion The motor functional imaging of 320 CT can pinpoint the patelar tracking in a fast, painless way.
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Objective:To investigate the enhancing effect of bone marrow stroma cell(BMSC)on the functional recovery of injured spinal cord by observing the formation of gliotic scar,cavity volume and the cascade of apoptosis of neural cells.Methods:Eighty spinal cord injury(SCI)rat models were made and randomly divided into two groups:group A(n=40),the control group without any treatment;group B(n=40),the injured animals treated with BMSC implantation.The behavioral evaluation was performed using Basso,Beattie and Bresnahan(BBB)scoring system.Scores were recorded at time points of 1,2,4,6 and 8 weeks after transplantation.After 8 weeks,rats were sacrificed.The immunoreactivity of Nogo-A,glial fibrillary acidic protein(GFAP)and the cavity area were measured.The cell apoptosis was detected by TUNEL methods at 1,2,3,7 and 14 days after injury.Results:Compared with control group,treated animals gained higher scores after 8 weeks of transplantation.The number and the size of reactive astrocytes,the average volume of cavity,TUNEL positive cells,the expression of Nogo-A and GFAP reduced significantly in group B compared with those of group A(P＜ 0.05).Conclusion:BMSC possess effects on repairing injured spinal cord and promoting functional recovery through various mechanisms.
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Objective To establish analysis methods of two-dimensional(2-DE)gel electrophoresis for human osteosarcoma.Methods A series of methods,including Immobilized pH gradient were used as ID.Some applications,such as sample preparation used as choice of IPG gel,were improved.Coomassie brilliant blue staining,ImageMaster 2D Elite 3.01 analysis software,MALDI-TOF/ TOF MS and SWISS-PROT database serching were used to separate and indentify the proteins of human osteosarcoma.Results The good use pattern including repetitive experiments showed that in three experiments,the amount of protein spots of the same team sample deviates from the relative standard as following,the average of variation coefficient(%) : 23.00?10.11 and 20.33?9.90;and the range of variation coefficient(%) were:3.80-6.89 and 2.706.89 from osteosarcoma and normal group respectively.The isoelectric point and molecular weigh of the same protein spots in three experiments deviated from relative standard as following:(8.93%?1.17)%,(10.16?2.02)%,(10.87?3.86)%,respectively.Therefore,better resolution and repetitive 2-DE atlas were obtained.The proteins from 11 pairs of sample were analysed by mass spectrometry,9 identified proteins(transthyretin precursor, Triosephosphate isomerase,slow skeletal muscle,cardiac muscle Troponin T,Cofilin-1,Myosin light chain 1,Calgranulin B,Heat-shock protein,Annexin A5, Fanconi anemia group D2 proteins) were more abundant in osteosarcoma tisstues and 2 proteins manganese SOD and carbonic dehydratase appeared down-regulation in osteosarcoma tisstues.Conclusion This optimized 2-DE map is an important tool for further study on osteosarcoma,and these identified proteins were related-proteins with osteosarcoma.It is suggested that the changes of the proteome are involved in the pathology processe of osteosarcoma.
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Objective To explore the relation of the expressions of MDM2 and VEGF in osteosarcoma with the pathological parameters and prognosis of the tumor.Methods The expressions of MDM2 and VEGF were detected with immunohistochemical(SP) method in specimens from 56 cases of osteosarcoma.The correlation between the expressions of MDM2,VEGF and pathological grade,metastasis and prognosis was analyzed statistically.while 8 cases of fibrous dysplasia of bone were used as negative control group.Results The positive rates of MDM2 and VEGF in osteosarcoma were 64.3%(36/56) and 67.9%(38/56),respectively .MDM2 and VEGF didn't express in negative control group.The expression of MDM2 and VEGF were not significantly correlated to the pathological grades of the osteosarcoma,but which were significantly correlated with tumor metastasis and prognosis(P
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Objective To construct the eukaryotic expression plasmid of recombinant human hypoxia-inducible factor-1?(HIF-1?) and get ready for the coloning and expressing of HIF-1? gene. Methods The total RNA was isolated from blood cells,and cDNA library was constructed by reverse transcription PCR method.PIREGFP containing EGFP fragment and cDNA were used as templet,the three designed primers (EGFP-linker,HIF-1? upstream and HIF-? downstream)were put into,after amplification the target gene fragment was inserted into the shuttle vector T,and transfected with E.coli DH5?,the bacterial colonies containing recombinant plasmids were identified by LB/KANA-agar plate,and the recombinant plasmids were extracted and purified.All sequences amplified by PCR were confirmed by complete sequencing.The correct sequences were cloned into the pVAX1 vector.Results The amplified fragments were about 870,1 199,672 bp by PCR,they were inserted into the shuttle vector T and sequenced. The result of sequencing was identical with that provided by GenBank.The final plasmid about 1 800 bp was obtained by the identification of enzyme digestion and it had same molecular size as expected.Conclusion The eukaryotic expression plasmid pVAX1-EGFP-linker-HIF-1? of recombinant human HIF-1? is successfully constructed.
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[Objective]To sturdy the biological responses of osteoblast-like cells in different maturation stages under shear flow.[Method]Flow chamber system was used to apply shear flow stimulation of 4.62dyn?s/cm~2 for 2 hours on osteoblast-like cell MC3T3-E1 of different maturation stage induced by osteogenic media,and then samples for dsDNA content and ALP activity analysis were collected.[Result]On 24 hours after simulation,there was not obvious change of ALP activity with non-osteogenic inducing group,an increase was observed in the group of 4 days of differentiation,while an decrease in the group of 8 days of differentiation.[Conclusion]Biological responses of osteoblast-like cells in different maturation stages under shear flow is quite different,and this may be an important role in bone growth and reconstruction.
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By integrating bone-remodeling theory with finite element (FEM) models, the behavior of femoral remodeling after implantation of artificial femoral head was simulated and the stress shield effect of artificial femoral head on the femur was analyzed quantitatively. Bone was calculated with finite element code of the FEM model. The normal loading condition of femur was used as Model One, and the stress condition that bone was fixed by the bone-cement of the artificial head with collar was used as Model Two. It has been shown that bone was stress-shielded by the artificial femoral head and femur resorbed. Bone resorption near the proximal artificial stem was very severe. Its cross-section resorbed the greatest. The ratio of cross-sectional resorption was psi = 31.3% and the ratio of loss of the anti-bend cross-sectional modulus was zeta = 54.58%.
Subject(s)
Humans , Arthroplasty, Replacement, Hip , Bone Remodeling , Bone Resorption , Computer Simulation , Femur Head , Physiology , Finite Element Analysis , Hip Prosthesis , Postoperative Period , Software , Stress, MechanicalABSTRACT
Objective To identify the application of puncture biopsy under ultrasound guidance in diagnosis of bone tumor.Methods The results of ultrasonic puncture biopsy were comparatively analysed with that of imaging diagnosis and postoperative-pathological diagnosis in 17 patients with bone tumors.Results The giant cell tumor of bone were diagnosed by puncture biopsy in 8 cases,by imaging in 12 cases and by pathology,postoperation in 9 cases,the corresponding rate was 66.7% and 88.9% respectively.Bone cyst in 2 cases,fibrous dysplasia in 2 cases,metastasis from lung carcinoma in one case,osteosarcoma in 2 cases were confirmed by both pathology and puncture biopsy.The aneurysmal bone cyst in one case was diagnosed by imaging,but no blood-like fluid was harvested in puncture,one case of metastasis in proximal femur,one case of fibrous dysplasia and one case of osteosarcoma were diagnosed by imaging,while one case,2 cases and one case diagnosed by puncture respectively.One case of bone cyst was confirmed by imaging,puncture biopsy and pathology.Conclusion The puncture biopsy under ultrasound guidance is of high diagnostic rate in bone tumors,it is a good choice for the diagnosis of bone tumor.